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Wind on Mars and the Huygens-Fresnel Principle

12 Mar 2018, 18:01 UTC
Wind on Mars and the Huygens-Fresnel Principle NASA/JPL/Univ. of Arizona

The big crater is ~400 m (1/4 mile) across. Wind blows sediment from the top to the bottom of the view, making some dune-like features (TARs, really) at the top and inside the crater. The rim at the top of the crater has a set of hills with a dip in between them, which allows wind and sediment to be funneled into the crater through a narrow valley. Once inside the crater, the wind expands laterally, so that some of the dune-like features form arcs, like ripples that form after you throw a rock into a pond.

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